137220407 has 2 divisors, whose sum is σ = 137220408. Its totient is φ = 137220406.

The previous prime is 137220403. The next prime is 137220469. The reversal of 137220407 is 704022731.

137220407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 137220407 - 2² = 137220403 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137220403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68610203 + 68610204.

It is an arithmetic number, because the mean of its divisors is an integer number (68610204).

Almost surely, 2^137220407 is an apocalyptic number.

137220407 is a deficient number, since it is larger than the sum of its proper divisors (1).

137220407 is an equidigital number, since it uses as much as digits as its factorization.

137220407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 137220407 is about 11714.1114473100. Note that the first 3 decimals coincide. The cubic root of 137220407 is about 515.7899799810.

The spelling of 137220407 in words is "one hundred thirty-seven million, two hundred twenty thousand, four hundred seven".